WO2011069359A1

WO2011069359A1 - Burden distributing device on top of blast furnace

Info

Publication number: WO2011069359A1
Application number: PCT/CN2010/073596
Authority: WO
Inventors: 盛正平; 邵远敬; 周强; 叶理德; 胡雪萍; 喻道明; 戚波; 范小钢; 刘菁; 徐时栋; 田兆营; 刘斌奇; 田杰; 牟丹; 唐恩
Original assignee: 中冶南方工程技术有限公司
Priority date: 2009-12-08
Filing date: 2010-06-07
Publication date: 2011-06-16
Also published as: CN101701271A; CN101701271B

Abstract

A burden distributing device on top of blast furnace comprises a top cover (1), a shell (2), a central tube (9), a left suspension shaft (20), a right suspension shaft (21), a left moving arm (22), a right moving arm (23), a chute (24), a rotating mechanism, and a tilting mechanism. The shell (2) joins a top ring (27) in a fixed manner. The top cover (1) joins the shell (2) in a fixed manner. An outlet at the lower-end of the central tube (9) is set over an inlet at the upper end of the chute (24). The left end on the upper part of chute (24) is hung on the left moving arm (22). The right end on the upper part of the chute (24) is hung on the right moving arm (23). The left moving arm (22) joins the left suspension shaft (20) in a fixed manner by a spline. The right moving arm (23) joins the right suspension shaft (21) in a fixed manner by a spline. The left suspension shaft (20) and the right suspension shaft (21) are respectively connected to a rotating cylinder of rotating mechanism (15) by a bearing. The left suspension shaft (20) joins a left crank of tilting mechanism (18) in a fixed manner. The right suspension shaft (21) joins a right crank of tilting mechanism (19) in a fixed manner. The device has characteristics of simple mechanical transmission principal, flexible burden distribution, high operating precision, reliable operation, convenient use and maintenance, and long service life.

Description

Blast furnace top cloth distribution device

Technical field

The invention relates to a blast furnace top cloth distributing device. Used in blast furnace roof fabrics, or similar process requirements for other shaft furnaces.

Background technique

When the blast furnace is smelting, the charge falls into the chute from the central throat. According to the process requirements, the charge is discharged into the furnace by a single ring, multiple rings, fixed point, fan shape, spiral, center plus coke, etc., which requires cloth. The chute of the device should have a rotary motion and a tilting motion.

Nowadays, the PW type bellless top distributor is commonly used on the blast furnace. The rotation of the cloth chute and the up and down tilting movement are respectively realized by two motor-driven planetary gear differential reduction transmission mechanisms, although the operation is stable and accurate, Due to the complexity of the mechanism and the high precision of manufacturing parts, the manufacturing cost is high. At the same time, the planetary gears are required to be harsh on lubrication and cooling during operation. When the temperature of the top of the blast furnace is too high, the jamming phenomenon occurs in the bearings and gears. It is difficult to repair or replace when a component fails.

There is also a hydraulic cylinder driven distributor (see CN85109284A). The tilting of the fabric chute is to lift the support ring through three hydraulic cylinders, and then use the linkage mechanism to complete the tilting of the chute. Although the principle of the distributor is simple, It is difficult to synchronize the hydraulic cylinders. In actual use, the movement clearance of the parts such as the support ring is increased, which inevitably reduces the transmission accuracy, and the compressibility of the hydraulic oil also reduces the motion accuracy. Obviously, because the chute is very long, a slight swing angle will cause a large displacement of the chute outlet.

technical problem

An object of the present invention is to provide a blast furnace top cloth distributing device which is reliable in operation and convenient in use and maintenance.

Technical solution

In order to achieve the above object, the technical solution adopted by the present invention is: a blast furnace top cloth distributing device, which is characterized in that it comprises a top cover, a casing, a central throat, a left suspension shaft, a right suspension shaft, a left boom, and a right boom. , the chute, the rotating mechanism, the tilting mechanism; the shell is fixedly connected with the top steel ring, the top cover is located on the upper end of the shell, the top cover is fixedly connected with the shell; the central part of the top cover is provided with a central throat mounting hole, the central throat The upper end of the tube is located in the central throat mounting hole and is fixedly connected with the top cover. The lower end output port of the central throat is located above the input port of the upper end of the chute, and the left end of the upper part of the chute is hung on the left moving arm, and the upper part of the chute is The right end card is hung on the right boom, the left boom and the left suspension shaft are fixedly connected by splines, the right boom and the right suspension shaft are fixedly connected by splines, and the left suspension shaft and the right suspension shaft respectively pass the rotation of the bearing and the rotating mechanism. The cylinder is connected; the left suspension shaft is fixedly connected to the left crank of the tilting mechanism, and the right suspension shaft is fixedly connected to the right crank of the tilting mechanism.

The rotating mechanism comprises a rotary reduction motor, a rotating gear, an upper slewing bearing and a rotating cylinder; the inner ring of the upper slewing bearing is fixedly connected with the top cover, and the outer ring of the upper slewing bearing is fixedly connected with the rotating cylinder, and the upper slewing bearing is externally The ring is provided with teeth, the teeth on the upper slewing bearing mesh with the rotating gear, the rotary gear motor is fixedly connected with the top cover, and the rotating gear is mounted on the output shaft of the rotary geared motor.

The tilting mechanism comprises a left tilting geared motor, a left tilting gear, a right tilting geared motor, a right tilting gear, a lower slewing bearing, a spiral lifting gear, a support wheel, a sliding box ring, a left link, a right link, a left crank, Right crank; the left crank is hinged to the left link, the right crank is hinged to the right link, and the left link and the right link are respectively hinged to the sliding box ring; the spiral lifting gear is provided with a spiral groove on the circumference of the spiral lifting gear, and the spiral of the spiral lifting gear 4-40 supporting wheels are arranged in the slot, the supporting wheel is fixedly connected with the housing, the left tilting gear and the right tilting gear are respectively meshed with the spiral lifting gear, and the left tilting gear is arranged on the output shaft of the left tilting geared motor, and the right tilting gear is arranged The left tilting geared motor and the right tilting geared motor are respectively fixedly arranged on the casing; the spiral lifting gear is fixedly connected with the outer ring of the lower slewing bearing, and the inner ring and the sliding box of the lower slewing ring are fixedly connected The ring is fixedly connected; the sliding box ring is provided with a sliding slot, and the sliding box ring is sleeved outside the rotating cylinder of the rotating mechanism, and the rotating cylinder of the rotating mechanism The provided slide is located in the chute of the sliding box ring.

Beneficial effect

The beneficial effects of the invention are:

1The mechanical transmission principle is simple, the fabric is flexible, the operation precision is high, the operation is reliable, the use and maintenance are convenient, and the service life is long. It can complete various process fabrics such as single ring, multi-ring, fixed point, fan shape, spiral, center plus focus, etc. demand.

2 The spiral lifting gear (ie Helix gear) is combined with the linkage mechanism to complete the tilting of the chute, which is completely different from the traditional planetary differential principle. It has the advantages of simple mechanical transmission principle, reliable operation and convenient use and maintenance.

3 The spiral lifting gear has many support points and high rigidity, and the lower slewing bearing is evenly distributed. The mechanically synchronously drives the left and right cranks, the chute tilting precision is high, and the movement is uniform and reliable.

4 The chute is tilted by a linkage mechanism, which has high bearing capacity and can hang a large chute with a length of 5m and a weight of 10t, which can meet the needs of large-scale blast furnaces.

5 The material chute adopts a rectangular cross section. Compared with the semi-circular cross section, the charge is not easy to fly out from the side wall of the chute end, and the furnace material is more concentrated and accurate.

6The spline shaft is used to drive the double-acting arm type of the sliding chute, and the chute replacement is simple and convenient.

7 The overall design is compact and has the same external connection dimensions as conventional planetary differential spreaders.

DRAWINGS

Figure 1 is a side view of the present invention;

Figure 2 is a plan view of the present invention;

Figure 3 is a cross-sectional view taken along line A-A of Figure 2;

Figure 4 is a cross-sectional view taken along line B-B of Figure 2;

Figure 5 is an engagement diagram of a helical lifting gear;

Figure 6 is an axial side view of the link portion;

Figure 7 is a mechanical schematic diagram of the present invention;

Figure 8 is a schematic diagram of the theoretical calculation of the contact of the spiral groove of the helical lifting gear with the support wheel.

Part number: 1-top cover, 2-shell, 3-left tilting geared motor, 4-left tilting gear, 5-right tilting geared motor, 6-right tilting gear, 7-rotary geared motor, 8-rotation Gear, 9-centre throat, 10-upper slewing ring, 11-lower slewing ring, 12-spiral lifting gear, 13-support wheel, 14-sliding box ring, 15-spin cylinder, 16-left link, 17-right link, 18-left crank, 19-right crank, 20-left suspension shaft, 21-right suspension shaft, 22-left boom, 23-right boom, 24-slot, 25-sink, 26 - water outlet, 27-furnace rim, 28-access door, 29-inlet, 30-nitlet, 31-slide, 32-slot, 33-emergency inlet, 34-first reservoir 35-second oil pool.

BEST MODE FOR CARRYING OUT THE INVENTION

As shown in FIG. 1, FIG. 2, FIG. 3 and FIG. 7, the blast furnace top cloth distributing device comprises a top cover 1, a casing 2, a central throat 9, a left suspension shaft 20, a right suspension shaft 21, and a left movable arm 22. The right moving arm 23, the chute 24, the rotating mechanism, the tilting mechanism; the housing 2 is fixedly connected with the top steel ring 27, the top cover 1 is located on the upper end of the housing 2, and the top cover 1 is fixedly connected with the housing 2; The central portion of the 1 is provided with a central throat mounting hole, the upper end of the central throat 9 is located in the central throat mounting hole and is fixedly connected to the top cover 1, and the lower end output port of the central throat 9 is located at the input end of the upper end of the chute 24. Upper (i.e., material passing through the central throat 9 can enter the chute 24), the left end of the upper portion of the chute 24 is hooked on the left boom 22, and the right end of the upper portion of the chute 24 is hooked on the right boom 23 (the section of the chute 24 is rectangular) The left side of the left boom and the right boom has a bump pressed against the chute, and the left side of the left boom and the right boom has a horizontal axis to support the chute, and the left boom 22 and the left suspension shaft 20 are fixedly connected by splines. The right boom 23 and the right suspension shaft 21 are fixedly connected by splines, and the left suspension shaft 20 and the right suspension shaft 21 respectively pass the bearing and the rotation mechanism. The rotating cylinder 15 is connected to rotate {the rotating cylinder 15 of the rotating mechanism rotates to drive the chute 24 to rotate; meanwhile, the left suspension shaft 20 and the right suspension shaft 21 are rotatable (connected by bearings) with respect to the rotating cylinder}; the left suspension shaft 20 The left crank shaft 18 is fixedly connected to the tilting mechanism, and the right suspension shaft 21 is fixedly coupled to the right crank 19 of the tilting mechanism (the left crank and the right crank of the tilting mechanism swing, and the left suspension shaft 20 and the right suspension shaft 21 are rotated to drive the left motion. The arm and the right boom are tilted to drive the chute 24 to tilt; at the same time, the left suspension shaft 20 and the right suspension shaft 21 are rotated with the rotating cylinder, that is, the chute 24 can rotate).

As shown in FIG. 1 and FIG. 7, the rotating mechanism includes a rotary reduction motor 7, a rotating gear 8, an upper slewing ring 10, and a rotating cylinder 15. The inner ring of the upper slewing ring 10 is fixedly connected to the top cover 1, and the upper slewing ring is supported. The outer ring of 10 is fixedly connected to the rotating cylinder 15, the outer ring of the upper slewing ring 10 is provided with teeth, the teeth on the upper slewing ring 10 are meshed with the rotating gear 8, and the rotary gear motor 7 is fixedly connected with the top cover 1, and the rotating gear 8 is rotated. It is mounted on the output shaft of the rotary geared motor. When the rotary geared motor rotates, the rotating ring can be driven by the rotating gear and the outer ring gear of the upper slewing ring.

As shown in FIG. 1 , FIG. 5 , FIG. 6 and FIG. 7 , the tilting mechanism includes a left tilting reduction motor 3 , a left tilting gear 4 , a right tilting reduction motor 5 , a right tilting gear 6 , a lower slewing bearing 11 , and a spiral lifting gear. 12. The support wheel 13, the sliding box ring 14, the left link 16, the right link 17, the left crank 18, and the right crank 19; the left crank 18 is hinged to the left link 16, and the right crank 19 is hinged to the right link 17. The left link 16 and the right link 17 are respectively hinged with the sliding box ring 14; the spiral lifting gear 12 is provided with a spiral groove on the circumference thereof, and the spiral lifting gear 12 has 4-40 supporting wheels 13 in the spiral groove (this embodiment) For example, 16), the support wheel 13 is fixedly connected with the casing 2, the left tilting gear 4 and the right tilting gear 6 are respectively meshed with the helical lifting gear 12, and the left tilting gear 4 is disposed on the output shaft of the left tilting reduction motor 3, and is tilted to the right. The moving gear 6 is disposed on the output shaft of the right tilting motor 5, and the left tilting motor 3 and the right tilting motor 5 are fixedly disposed on the casing 2 (the left tilting gear 4 and the right tilting gear 6 are rotated only, and are not moved up and down). ; rotation causes the helical lifting gear 12 to move up and down; The lifting gear 12 is fixedly connected to the outer ring of the lower slewing ring 11, and the inner ring of the lower slewing ring 11 is fixedly connected with the sliding box ring 14 (the spiral lifting gear 12 moving up and down drives the sliding box ring 14 to move up and down, thereby driving the chute to tilt The sliding box ring 14 is provided with a sliding slot 32, and the sliding box ring 14 is sleeved outside the rotating cylinder 15 of the rotating mechanism, and the slide 31 provided on the rotating cylinder 15 of the rotating mechanism is located at the sliding box ring 14. Inside the chute 32 (as shown in Figure 6; when the rotating cylinder rotates, under the action of the chute and the chute, the sliding box ring rotates with the rotating cylinder, while the connecting rod, the crank, the suspension shaft The boom and the chute will rotate together with the rotating cylinder to complete the rotation of the chute).

The tilting gear motor drives the tilting gear to drive the screw lifting gear 12, and the spiral lifting gear 12 rotates along the axis to move up and down; the spiral lifting gear 12 is fixedly connected with the outer ring of the lower slewing ring 11, and the inner ring and the sliding box shape of the lower slewing bearing The ring 14 is fixedly connected to drive the sliding box ring up and down; thus, the chute is tilted through the connecting rod, the crank, the suspension shaft and the boom.

The invention adopts the labyrinth floating ring nitrogen seal and the water tank and the jacket type water cooling, so that the invention can effectively adapt to the working condition of high temperature and dust.

The transmission parts that are tilted by the chute need to be rotated circumferentially. The lower slewing bearing and the suspension shaft bearing are all lubricated by the oil pool to ensure sufficient lubrication and long life.

Spiral lifting gear (ie Helix gear): The so-called Helix gear, that is, the gear moves along its axis while rotating, as shown in Figure 5. Ordinary gears only rotate around their axes, while Helix gears combine the principles of gearing and screw drive, and the Helix gear moves along the axis of rotation. The specific structure is: a spiral groove is arranged on a circumference of a wide common gear, and a plurality of support wheels are arranged, and the support wheel supports the spiral groove, so when the gear rotates one axis, the cooperation of the spiral groove and the support wheel The gear will move a pitch displacement along its axis of rotation, and the transmission gear meshing therewith will only make a rotational motion.

a), the Helix gear rotates and moves along the axis, and the transmission gear meshing with it only rotates, and the spiral of the spiral groove has a larger diameter and a smaller pitch, that is, a smaller spiral angle;

b), the teeth of the Helix gear along the tooth width direction are in phase, just like a whole gear cuts the spiral groove from the middle, so the purpose of the design is to facilitate the processing and manufacturing of the Helix gear;

c) Helix gears can be used with ordinary straight teeth or helical teeth. Straight teeth are used, and the gears are meshed in the direction of the tooth width, which increases the wear of the gears to some extent. When the helical teeth are used, the Helix gears use helical teeth and the β angle of the Helix gear is equal to the spiral groove. The helix angle and the opposite direction of rotation, and the transmission pinion meshing with it adopts straight teeth, and a special traditional "staggered shaft helical gear" transmission is formed between them. Since the helix angle is small, the bearing capacity after running and The meshing characteristics are equivalent to ordinary gears;

d), the support wheel is designed to be conical, and the spiral groove of the Helix gear is also designed as a spiral cone, as shown in FIG. R1/R2=r1/r2, R1 is the outer diameter of the Helix gear, R2 is the inner diameter of the spiral groove, r1 is the maximum radius of the support wheel, and r2 is the minimum radius of the support wheel. The advantage of this is that the support wheel and the spiral groove In the orbital motion, pure rolling is theoretically formed to reduce the wear, and the conical shape is also conducive to Helix centering.

Claims

1. Blast furnace top cloth distributing device, characterized in that it comprises a top cover (1), a casing (2), a central throat (9), a left suspension shaft (20), a right suspension shaft (21), and a left boom (22) , the right boom (23), the chute (24), the rotating mechanism, the tilting mechanism; the casing (2) is fixedly connected with the roof rim (27), and the top cover (1) is located at the upper end of the casing (2). The top cover (1) is fixedly connected with the casing (2); the central portion of the top cover (1) is provided with a central throat installation hole, and the upper end of the central throat tube (9) is located in the central throat installation hole and with the top cover (1) Fixed connection, the lower end of the central throat (9) is located above the input of the upper end of the chute (24), and the left end of the upper part of the chute (24) is hooked on the left arm (22), chute (24) The upper right end is hooked on the right boom (23), the left boom (22) and the left suspension shaft (20) are fixedly connected by splines, and the right boom (23) and the right suspension shaft (21) are fixed by splines. Connection, the left suspension shaft (20) and the right suspension shaft (21) are respectively connected to the rotating cylinder (15) of the rotating mechanism through the bearing; the left suspension shaft (20) Fixedly connected with the left crank (18) of the tilting mechanism, and right suspension shaft (21) fixedly connected with the right crank (19) of the tilting mechanism.

The blast furnace top distributing device according to claim 1, wherein the rotating mechanism comprises a rotary reduction motor (7), a rotating gear (8), an upper slewing bearing (10), and a rotating cylinder (15) The inner ring of the upper slewing bearing (10) is fixedly connected with the top cover (1), the outer ring of the upper slewing bearing (10) is fixedly connected with the rotating cylinder (15), and the outer ring of the upper slewing bearing (10) is provided with teeth. The teeth on the upper slewing bearing (10) mesh with the rotating gear (8), the rotary gear motor (7) is fixedly connected to the top cover (1), and the rotating gear (8) is mounted on the output shaft of the rotary reduction motor.

The blast furnace top distributing device according to claim 1, wherein the tilting mechanism comprises a left tilting motor (3), a left tilting gear (4), a right tilting motor (5), and a right tilting gear. (6), lower slewing bearing (11), spiral lifting gear (12), support wheel (13), sliding box ring (14), left link (16), right link (17), left crank (18 ), the right crank (19); the left crank (18) is hinged to the left link (16), the right crank (19) is hinged to the right link (17), and the left link (16) and the right link (17) are respectively It is hinged to the sliding box ring (14); a spiral groove is arranged on the circumference of the spiral lifting gear (12), and 4-40 supporting wheels (13) are arranged in the spiral groove of the spiral lifting gear (12), and the supporting wheel (13) ) fixedly connected to the casing (2), the left tilting gear (4) and the right tilting gear (6) are respectively meshed with the helical lifting gear (12), and the left tilting gear (4) is arranged at the output of the left tilting geared motor (3) On the shaft, the right tilting gear (6) is set on the output shaft of the right tilting geared motor (5), left leaning The reduction motor (3) and the right tilting reduction motor (5) are respectively fixedly disposed on the casing (2); the spiral lifting gear (12) is fixedly connected with the outer ring of the lower slewing bearing (11), and the lower slewing bearing (11) The inner ring is fixedly connected with the sliding box ring (14); the sliding box ring (14) is provided with a sliding slot, and the sliding box ring (14) is sleeved outside the rotating cylinder (15) of the rotating mechanism, and the rotation of the rotating mechanism A slide provided on the cylinder (15) is located in the chute of the sliding box ring (14).